andrews



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(No Model.)

E. ANDREWS. DRIBR FOR PAPER BOARD.

Patented Mar. 31, 1885.

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(No Model.) 2 Sheets-Sheet 2. E. ANDREWS.

DRIBR POR PAPER BOARD. r No. 314,640. Patented Mar. 31, 1885.

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`Unirse Stearns Partnr reina EMERY ANDREVS, OF KENNEBUNK, MAINE.

DRlER FOR PAPER-BOARD.

SPECIFICATION forming part of Letters Patent No. 314,640, dated March 3l, 1885.

Application med Decembre 15, 'lesa (No man.) v

To @ZZ whom it may concern:

Be it known that I, EMERY ANDREws, of Kennebunk, in the county of York and State of Maine, have invented a new and useful Improvement in Driers for Paper-Board, of which the following is a specication.

My invention relates to that class of driers in which hollow flat steam-plates are used and the paper or other sheet to be dried is spread thereon. In practice it is found that in drying certain kinds ol' board upon such plates it curls or warps to such a degree that it cannotafterward be calendered smooth without having wrinkles or lapsformed in it, which are a serious injury.

The object of my invention is to obviate this difficulty; and my invention consists of the combination, with a steam or other hot plate, of a frame or rack made of thin strips ot material so shaped and arranged as to present a small amount of surface to the sheet of material to be dried when pressed down thereon, in combination with peculiar devices, whereby such frame may be readily inserted between two such plates and pressed down and held upon the sheet of material to be dried.

In the drawings, Figure 1 represents an end view of a drier of the kind in general use; Fig. 2, a side elevation of the same; Fig. 3, a view of several detached steam-plates with my invention applied; Fig. 4, a longitudinal section of the three upper plates through line x of Fig. 5, and Fig. 5 a transverse section on line z of Fig. 4.

Like letters of reference refer to like parts in each of the drawings.

In a suitable frame, A A, are mounted the steam-plates b b b, so arranged that there may be a central space, B, between two vertical rows of such plates, each inclining slightly upward toward such chamber, so that the moisture evaporated from the material being dried may pass into such space and be removed by a ventilator. The plates are connected at alternate ends by the pipes c o, so that steam entering one of the upper plates by the pipe d will pass the length of the plate before entering the next one below, and so passing the length of each plate before reach ing the bottom one, the Condensed water and steam may be drained by a suitable pipe. This system of plates forms no part of my invention, except as used in connection with the rack shown at C, Fig. 3, which represents a frame or rack made of thin strips of material put together, as shown, so that when applied to a sheet of material to be dried it will present only a small amount of surface to such sheet.

Between the steanrplates b b are placed the strips g g, shaped so as each to have a supporting-ledge, h, upon which projecting blocks iiof the frame C may slide. At the vinner edge of the plates this ledge is tapered down nearly to the surface of the plate, as seen at lc, and a wedge-shaped piece, rm., is placed over such tapered portion, so as to form an inclined groove between itself and the tapered portion of the ledge lo.

D represents a sheet of board upon the lower plate in Fig. 3, curled, as is usual in drying. Upon the next plate is represented a sheet, D, upon which is a rack like G. The sheet of board is first spread smoothly upon the plate. Then the edge of the rack C is inserted between the board and the next plate above it, the blocks z' t' resting on the ledges h, so that it is held free from the board, the front edge being held by the operator. It is Ithus moved inward above the board, and when the blocks t' t' reach the wedgeshaped blocks m m they (the blocks t i) are carried downward, forcing that edge of the rack. down upon the board. The front edge may then be 4depressed by the operator and fastened by wedges p p, or other suitable means.

I claim- 1. In combination with one or more plates, b b, supported in a suitable frame, A A, the rack C, provided with the blocks t' t, and the tapered blocks m m, attached to suitable guidepieces g g, arranged and to operate substantially as set forth.

2. In combination with one or more plates, b b, supported in a frame, A A, the rack C,

provided with the blocks t' t', and the guidepieces g g w1th ledges hh, and tapered blocks m m, arranged and to operate substantially as described and shown.

3. In combinatie b b, supported in 5 rack C, provided n with one or more plates, a suitable frame, A A, the with the blocks i z', the nelined blocks m m, supported on the guiderails g g and s0 arranged that the blocks z' z' shall slide beneath them and thus depress the rear of the rack C, and holding down the front of tially as specified.

the'wedgesp p, for

the rack, substan- 1o 

